Complete Test attached for reference. There are 3 cases with different algorithm names. Please try for each case as the exception message differs.

            KeyFactory kf = KeyFactory.getInstance(algorithm, provider);
            PKCS8EncodedKeySpec privSpec = new PKCS8EncodedKeySpec(
                    Base64.getMimeDecoder().decode(<Openssl generated keys string>));
            EdECPrivateKey privKey
                    = (EdECPrivateKey) kf.generatePrivate(privSpec);
            checkPrivKeyFormat(privKey.getEncoded());

            NamedParameterSpec namedSpec = new NamedParameterSpec(<algorithm name as applicable>);
            EdECPrivateKeySpec edprivSpec
                    = new EdECPrivateKeySpec(namedSpec, privKey.getEncoded());
            privKey = (EdECPrivateKey) kf.generatePrivate(edprivSpec); // FAILS here while generating the keys.